CN213780266U - Extra-high voltage GIS equipment partial discharge positioning and identifying device based on magnetic sensor - Google Patents
Extra-high voltage GIS equipment partial discharge positioning and identifying device based on magnetic sensor Download PDFInfo
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- CN213780266U CN213780266U CN202022756467.2U CN202022756467U CN213780266U CN 213780266 U CN213780266 U CN 213780266U CN 202022756467 U CN202022756467 U CN 202022756467U CN 213780266 U CN213780266 U CN 213780266U
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Abstract
The utility model discloses an extra-high voltage GIS equipment partial discharge location recognition device based on magnetic sensor relates to partial discharge detection technical field. The utility model discloses a TMR component, GIS outside, TMR component include first barrel and second barrel, and first flange has all been installed at the relative both ends of first barrel and second barrel, and the notch has all been seted up to inner wall one side of first barrel and second barrel, installs built-in sensor in the notch. The utility model discloses a TMR component, the GIS outside that set up, have integrate, the frequency bandwidth, the consumption is little, the resolution ratio is high, the interference killing feature is strong, the accurate function in location, can carry out on-line measuring and discernment and location to GIS equipment defect, through the TMR magnetic sensor who sets up, can be fine distinguish corona discharge, discharge along the surface, suspension discharge, free particle discharge, the defect is put in this five kinds of common special high voltage GIS partial discharges of hole discharge to the practicality of device has been improved.
Description
Technical Field
The utility model belongs to the technical field of partial discharge detection, especially, relate to an extra-high voltage GIS equipment partial discharge location recognition device based on magnetic sensor.
Background
GIS is the english name for gas insulated switchgear. The GIS installs the breaker, the bus, the inlet and outlet wire sleeve, the isolating switch, the grounding switch, the voltage transformer, the current transformer, the lightning arrester, the cable terminal and other devices in a closed space, and selects SF6 gas as an insulating medium, thereby enhancing the insulating property between the devices, and after the optimized design, effectively reducing the device volume and the connection distance between the devices, thereby greatly reducing the whole volume of the GIS, being beneficial to the GIS to be installed in a large number of power systems, the voltage level of the extra-high voltage GIS device is high, the field operation environment is complex, the deterioration and the defect of the insulating part thereof have great influence on the safe and stable operation of the power grid, therefore, the strengthening is vital to the state monitoring of the internal equipment of the GIS, and the main defects of the extra-high voltage GIS device in operation are represented as heating defects, local discharging defects and mechanical defects. Through research and study, the partial discharge type defects are the main cause of insulation degradation of the extra-high voltage GIS equipment.
When there is a defect in the GIS, signals such as sound, light, electricity, etc. are usually accompanied, so some mainstream partial discharge detection methods at present include infrared detection method, ultrasonic detection method, ultrahigh frequency detection method, optical detection method, X-ray detection method, etc. The most used methods are two partial discharge detection methods, namely an ultrasonic detection method and a ultrahigh frequency detection method. The ultrasonic partial discharge monitoring method can avoid the interference of electromagnetic signals, has accurate positioning precision, is easily interfered by environmental noise, has larger vibration of equipment when a switch is switched on and off, is easy to generate misjudgment, and seriously attenuates ultrasonic signals when the ultrasonic signals are transmitted in an insulating material, thereby seriously affecting the monitoring precision. The ultrahigh frequency method can effectively avoid the interference of field corona and the like due to high detection frequency, can realize the type identification of the insulation defect due to high detection sensitivity, is easily influenced by ultrahigh frequency electromagnetic interference in the environment, and is difficult to realize the accurate positioning and the positioning range of partial discharge.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an extra-high voltage GIS equipment partial discharge location recognition device based on magnetic sensor, TMR component through setting up, GIS is outside, there is integration, the frequency band is wide, the consumption is little, the resolution ratio is high, the interference killing feature is strong, fix a position accurate function, can carry out on-line measuring and discernment and location to GIS equipment defect, TMR magnetic sensor through setting up, can be fine distinguish corona discharge, discharge along the surface, suspension discharge, free particle discharge, the defect is put in these five kinds of common extra-high voltage GIS partial discharges of hole discharge, thereby the practicality of device has been improved, the problem that exists among the above-mentioned prior art has been solved.
In order to achieve the purpose, the utility model is realized by the following technical proposal:
a magnetic sensor-based extra-high voltage GIS equipment partial discharge positioning and recognizing device comprises a TMR element, a GIS outer part and a TMR element, wherein the TMR element comprises a first cylinder and a second cylinder, first flanges are respectively arranged at two opposite ends of the first cylinder and the second cylinder, notches are respectively arranged at one side of the inner walls of the first cylinder and the second cylinder, built-in sensors are arranged in the notches, and a first basin-type insulator is arranged between the first cylinder and the second cylinder;
four three-axis TMR magnetic sensors are uniformly arranged on one side of the first basin-type insulator, a second flange is arranged on the other side of the first basin-type insulator, a signal receiver corresponding to the built-in sensor is arranged on the periphery of the second flange and the first basin-type insulator, a second basin-type insulator is arranged at one end of the second cylinder body, and the second basin-type insulator is positioned between the second cylinder body and the first flange;
a local discharge source is installed on one side of the inner wall of the second cylinder, conductors are installed inside the first cylinder and the second cylinder, and the conductors penetrate through the middle portions of the first basin-type insulator and the second basin-type insulator.
Optionally, the TMR element is provided with a top layer, a free layer, a tunnel barrier layer, a pinned layer, a bottom layer, and an insulating substrate in sequence from top to bottom.
Optionally, the GIS outside includes a GIS cavity outside signal receiver and an upper computer, and the GIS cavity outside signal receiver is in wireless transmission connection with the upper computer.
Optionally, the local discharge source pulse magnetic field is inductively connected with a limited transmission TMR magnetic sensor module and a wireless transmission TMR magnetic sensor module.
Optionally, the limited-transmission TMR magnetic sensor module includes TMR magnetic sensor and power module, and the TMR magnetic sensor is connected with power module, and limited-transmission TMR magnetic sensor module is connected with the wired transmission of signal receiver outside the GIS cavity.
Optionally, the wireless transmission TMR magnetic sensor module includes the TMR magnetic sensor, wireless communication unit, power module, and the TMR magnetic sensor is connected with wireless communication unit and power module, and wireless communication unit is connected with power module, and wireless transmission TMR magnetic sensor module is connected with the outer signal receiver wireless transmission of GIS cavity.
The embodiment of the utility model has the following beneficial effect:
the utility model discloses an embodiment is outside through TMR component, the GIS that sets up, has the function that integrates, the frequency band is wide, the consumption is little, the resolution ratio is high, the interference killing feature is strong, the location is accurate, can carry out on-line measuring and discernment and location to GIS equipment defect, through the TMR magnetic sensor who sets up, can be fine distinguish corona discharge, creeping discharge, suspension discharge, free particle discharge, the defect is put in this five kinds of common special high voltage GIS office of hole discharge to the practicality of device has been improved.
Of course, it is not necessary for any particular product to achieve all of the above-described advantages at the same time.
Drawings
The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural diagram of a TMR element according to an embodiment of the present invention;
fig. 2 is a schematic layout view of six three-axis TMR magnetic sensors according to an embodiment of the present invention;
fig. 3 is a distribution diagram of four three-axis TMR magnetic sensors on a basin-type insulator according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a wireless TMR magnetic sensor module according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a system for collecting and transmitting partial discharge signals according to an embodiment of the present invention.
Fig. 6 is a schematic structural diagram of an online distinguishing and positioning partial discharge system of a TMR magnetic sensor according to an embodiment of the present invention.
Fig. 7 is a schematic diagram of a partial discharge defect structure of five typical extra-high voltage GIS devices according to an embodiment of the present invention.
Fig. 8 is a schematic structural diagram of a sensitive axis of a three-axis TMR magnetic sensor in a positioning system according to an embodiment of the present invention.
Wherein the figures include the following reference numerals:
the device comprises a first cylinder 1, a notch 101, a second cylinder 2, a first flange 3, a built-in sensor 4, a first basin-type insulator 5, a three-axis TMR magnetic sensor 6, a second flange 7, a second basin-type insulator 9, a local discharge source 10 and a conductor 11.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
To maintain the following description of the embodiments of the present invention clear and concise, detailed descriptions of well-known functions and components may be omitted.
Referring to fig. 1 to 8, in this embodiment, a device for locating and identifying partial discharge of an extra-high voltage GIS device based on a magnetic sensor is provided, including: the TMR element and the GIS are external and comprises a first cylinder body 1 and a second cylinder body 2, the opposite two ends of the first cylinder body 1 and the second cylinder body 2 are respectively provided with a first flange 3, one side of the inner wall of the first cylinder body 1 and one side of the inner wall of the second cylinder body 2 are respectively provided with a notch 101, a built-in sensor 4 is arranged in the notch 101, and a first basin-type insulator 5 is arranged between the first cylinder body 1 and the second cylinder body 2;
four three-axis TMR magnetic sensors 6 are uniformly arranged on one side of a first basin-type insulator 5, a second flange 7 is arranged on the other side of the first basin-type insulator 5, a signal receiver 8 corresponding to the built-in sensor 4 is arranged on the periphery of the second flange 7 and the first basin-type insulator 5, a second basin-type insulator 9 is arranged at one end of a second cylinder body 2, and the second basin-type insulator 9 is positioned between the second cylinder body 2 and the first flange 3;
a local discharge source 10 is installed on one side of the inner wall of the second cylinder 2, conductors 11 are installed inside the first cylinder 1 and the second cylinder 2, and the conductors 11 penetrate through the middle parts of the first basin-type insulator 5 and the second basin-type insulator 9.
The application of one aspect of the embodiment is as follows: when TMR magnetic sensor on-line discernment location partial discharge system, the pulse magnetic field output signal of telecommunication that the current produced is put in the induction office of TMR magnetic sensor, GIS cavity external signal receiver accepts the signal of telecommunication, GIS cavity external signal receiver transmits through wireless communication and gives information processing module and TMR original paper, information processing module map shows to transmit and carries out the result storage for the identification module is put in the office, the TMR original paper carries out the office and puts the defect location. It should be noted that the TMR element, GIS referred to in this application may be externally powered by a battery or an external power supply.
Through TMR component, the GIS outside that sets up, have integrate, the frequency band is wide, the consumption is little, the resolution ratio is high, the interference killing feature is strong, the accurate function in location, can carry out on-line measuring and discernment and location to GIS equipment defect, through the TMR magnetic sensor who sets up, can be fine distinguish corona discharge, creeping discharge, suspension discharge, free particle discharge, the defect is put in the special high voltage GIS office of these five kinds of common of hole discharge to the practicality of device has been improved.
The TMR element of this embodiment is provided with a top layer, a free layer, a tunnel barrier layer, a pinned layer, a bottom layer, and an insulating substrate in this order from top to bottom.
The GIS of this embodiment is outside including GIS cavity outer signal receiver, host computer, and GIS cavity outer signal receiver and host computer wireless transmission are connected.
The local discharge source 10 of the present embodiment is inductively connected with a TMR magnetic sensor module for limited transmission and a TMR magnetic sensor module for wireless transmission.
The limited transmission TMR magnetic sensor module of this embodiment includes TMR magnetic sensor and power module, and the TMR magnetic sensor is connected with power module, and limited transmission TMR magnetic sensor module is connected with the wired transmission of GIS cavity outer signal receiver.
The wireless transmission TMR magnetic sensor module of this embodiment includes TMR magnetic sensor, wireless communication unit, power module, and TMR magnetic sensor is connected with wireless communication unit and power module, and wireless communication unit is connected with power module, and wireless transmission TMR magnetic sensor module is connected with the outer signal receiver wireless transmission of GIS cavity.
The extra-high voltage GIS equipment has high voltage level and complex field operation environment, and the deterioration and defects of the insulation part of the extra-high voltage GIS equipment have great influence on the safe and stable operation of a power grid, so that the condition monitoring of the internal equipment of the GIS is strengthened. The main defects of the running extra-high voltage GIS equipment are represented as heating defects, partial discharge defects and mechanical defects. Through research and study, the partial discharge type defects are the main cause of insulation degradation of the extra-high voltage GIS equipment.
When there is a defect in the GIS, signals such as sound, light, electricity, etc. are usually accompanied, so some mainstream partial discharge detection methods at present include infrared detection method, ultrasonic detection method, ultrahigh frequency detection method, optical detection method, X-ray detection method, etc. The most used methods are two partial discharge detection methods, namely an ultrasonic detection method and a ultrahigh frequency detection method. The ultrasonic partial discharge monitoring method can avoid the interference of electromagnetic signals, has accurate positioning precision, is easily interfered by environmental noise, has larger vibration of equipment when a switch is switched on and off, is easy to generate misjudgment, and seriously attenuates ultrasonic signals when the ultrasonic signals are transmitted in an insulating material, thereby seriously affecting the monitoring precision. The ultrahigh frequency method can effectively avoid the interference of field corona and the like due to high detection frequency, and can realize the type identification of the insulation defect due to high detection sensitivity. However, the ultrahigh frequency method is easily affected by ultrahigh frequency electromagnetic interference in the environment, accurate positioning of partial discharge is difficult to achieve, and the positioning range is often determined in 1-2 air chambers, so that the partial discharge is positioned by a common acoustoelectric method.
Based on the above background, a partial discharge detection technology with the advantages of high sensitivity, high precision, high linearity, large linear range, strong anti-interference capability, large frequency width, small size, low power consumption, high resolution, proper working temperature and the like is proposed, that is, a magnetic sensor based on a tunnel magneto-resistance (TMR) effect is used for identifying the type of partial discharge and positioning the partial discharge position.
The magnetic sensor based on tunneling magneto-resistance (TMR) effect is adopted to identify the type of partial discharge and locate the position of the partial discharge power supply. The TMR magnetic sensor is distinguished from a plurality of magnetic sensors due to excellent performance, is arranged in GIS equipment, senses a pulse magnetic field generated by partial discharge pulse current, outputs a real-time voltage signal, transmits the voltage signal to a signal receiver outside a GIS cavity through a wired or wireless module, transmits the voltage signal to a remote data processing center through wireless communication, and is provided with three modules. Then displaying useful maps such as a time frequency spectrum, a Hilbert spectrum, a marginal spectrum and the like after HHT transformation; the pattern recognition module reads the denoising result, extracts and stores the characteristics on the map, uses the neural network to recognize the characteristics to obtain which partial discharge defect is, and displays and stores the recognition result; the database management module is used for storing and inquiring the partial playing processing result. The TMR magnetic sensor has simple output port and is easy to be arrayed. Therefore, a method for measuring the position of partial discharge by combining six three-axis TMR magnetic sensors is provided. The specific detection method and implementation steps are as follows.
(1) The mechanism of generation of the tunneling magnetoresistive effect (TMR) is the spin-dependent tunneling effect. A Magnetic Tunnel Junction (MTJ) of an exchange-biased spin valve structure is typically a sandwich structure including a pinned layer composed of a ferromagnetic layer (pinned layer) and an antiferromagnetic layer, a tunnel barrier layer, and a free layer composed of a ferromagnetic layer. The magnetic moment of the free layer is relatively free and rotatable with respect to the magnetic moment of the pinned layer, and can be switched with a change in an external field. When the magnetization directions of the free layer and the pinning layer are parallel, the tunnel junction is in a low resistance state; when the magnetization directions of the free layer and the pinning layer are antiparallel, the tunnel junction is in a high resistance state; when the free layer magnetic moment is perpendicular to the pinned layer magnetic moment, the resistance is an intermediate value between the low resistance state and the high resistance state. The TMR element has the advantages of small power consumption (0.001-0.01 mA), small size (0.5 x 0.5mm), high sensitivity (20mV/V/Oe), wide working range (0.001-200 Oe), high resolution, good temperature stability, frequency response up to GHz and no need of an additional magnetic gathering ring structure, so that the TMR sensor based on the TMR element is more suitable for local discharge current detection. The push-pull Wheatstone full-bridge structure design in the TMR magnetic sensor is applied most at present, provides differential voltage output, inhibits common-mode noise signals and has good temperature stability.
(2) The typical partial discharge of the GIS device comprises five types, namely corona discharge, creeping discharge, suspension discharge, free particle discharge and cavity discharge. Different partial discharge defects have different discharge characteristics, such as different waveforms, different discharge frequencies, different phases, different discharge sizes and times. It is possible to discriminate which kind of partial discharge defect is.
(3) The TMR magnetic sensor is arranged in the GIS device so as to better sense a pulse magnetic field generated by partial discharge current and is not easy to be interfered by an external electromagnetic environment, and then an output voltage signal is transmitted to a signal receiver outside the GIS cavity in a wired or wireless mode. The built-in wired transmission sensor is generally installed on the inner wall of a hand hole or a hatch cover plate of GIS equipment, and the plane of the sensor is flush with the inner wall of a GIS shell, so that the influence on the distribution of an electric field in the GIS is reduced as much as possible. The built-in wireless transmission sensor is generally in close contact with the basin-type insulator, because electromagnetic waves can only leak out from the metal discontinuous part of the shell, and no metal flange is arranged on the basin-type insulator on the GIS. And the sensor is placed between two bolts for fixing the basin-type insulator, so as to reduce the shielding of the bolts on the internal electromagnetic waves and the external electrostatic interference generated by the sensor and the bolts.
(4) And transmitting the signals collected by the signal receiver outside the GIS cavity to a remote data processing center through a wireless communication module. The remote data processing center has three modules, the first of which is an information processing module. The obtained voltage signal is filtered to remove the low frequency interference signal, which is performed by high pass filtering method because the frequency of the partial discharge signal is generally concentrated on the kHz or even MHz level. Since the partial discharge signal is very weak, it is necessary to amplify the signal, and the amplifier circuit is required to have an appropriate amplification factor, high resolution, stable linearity, wide frequency band, stable operation performance, high common mode rejection ratio, high input impedance, and the like. And then, performing analog-to-digital conversion on the signal to obtain a digital signal, and performing signal denoising processing on the signal by using Hilbert-Huang (HHT) transformation. The HHT transformation is divided into two parts, the first part is Empirical Mode Decomposition (EMD), which is a signal decomposition based on the time scale characteristics of the data itself without any basis functions being preset. The method can decompose the complex signal into a finite number of Intrinsic Mode Functions (IMFs), and each decomposed IMF component comprises local characteristic signals of different time scales of the original signal. The second part is to perform Hilbert transform on each IMF to obtain a corresponding Hilbert. And finally, summarizing the Hilbert-Pops of all the IMFs to obtain the Hilbert-Pop of the original signal. The HHT has obvious advantages, is completely adaptive, is not limited by a Heisenberg inaccurate measurement principle, is suitable for analyzing abrupt change signals, can analyze nonlinear and non-stationary signals compared with Fourier transform and wavelet transform, is local in instantaneous frequency obtained through the HHT, and is more suitable for analyzing local discharge current signals and filtering and denoising the signals compared with the global frequency of the Fourier transform and the regional frequency of the wavelet transform.
The EMD decomposes a signal into Intrinsic Mode Functions (IMFs) with frequencies from high to low in a plurality of orders, and the whole process embodies the multi-scale adaptive filtering characteristic. Numerous experiments have shown that the IMFs obtained from EMD decomposition are monochromatic (at least narrow-band) at any one time segment. Narrow-band periodic interference is an important interference in partial discharge detection, and mainly comes from carrier communication and radio broadcasting of a power system. The carrier communication frequency of the power system is 40-500 kHz, the frequency of radio broadcasting is generally more than 500kHz, noise interference of low frequency is filtered in front, and the frequency spectrum characteristic of periodic narrow-band interference and the frequency spectrum characteristic of partial discharge signals have larger difference and are easy to remove. White noise is also a common type of interference, and is mainly caused by thermal noise, thermal noise of distribution lines and relay protection lines and shot noise of semiconductor devices in detection circuits, and has similar time domain and frequency domain characteristics with a partial discharge signal, the energy of the noise signal is distributed in the whole frequency domain, and general frequency domain analysis cannot distinguish the white noise from the partial discharge signal. EMD is well suited to filter the two above types of noise because it can be analyzed time-frequency locally. There is a method: namely, a variable step length Least Mean Square (LMS) adaptive filtering algorithm is used, because the LMS adaptive filtering algorithm is not suitable for filtering interference signals with wider frequency, and the EMD decomposes the signals to different frequency bands, so that the signals after denoising can be obtained by performing adaptive filtering on each IMF and then reconstructing the signals. There may be some solutions to both end-point effects and modal aliasing that may be encountered during EMD.
(5) The second module is a pattern recognition module. The EMD can be used for denoising, and after Hilbert transformation, each IMF can be gathered to obtain useful maps such as a Hilbert spectrum, a time-frequency spectrum, a marginal spectrum and the like of an original signal, features can be extracted from the maps, and generally, frequency domain features are easier to distinguish than time domain features, so that energy feature values can be extracted from the marginal spectrum, some feature values and the like are extracted from time-frequency entropy vectors based on the time-frequency spectrum, and then the obtained feature values are distinguished through a neural network, so that the partial discharge defect is known.
(6) The third module is a database management module and is mainly used for storing and inquiring partial discharge processing results, wherein the partial discharge processing results comprise storage and inquiry of processing time, transformer station names, GIS equipment models and partial discharge defects.
(7) The positioning method comprises the following steps: TMR magnetic sensors are also very sensitive to the angle of the external magnetic field. Along with the rotation of the magnetic field, the resistance value of the magnetic tunnel changes correspondingly along with the change of the included angle of the magnetic field directions of the free layer and the pinning layer, the change value is represented by a graphic curve and is approximate to the change of sine and cosine relations, so the output voltage of the sensor becomes a sine and cosine curve along with the change of the angle of the external magnetic field. And when the magnetic field is small, the influence of the magnetic field on the sensor cross field axis on the magnetic field on the sensor sensitive axis can be ignored. Therefore, the three-axis TMR magnetic sensor is used for carrying out partial discharge positioning, because the three sensitive axes of the sensor are perpendicular to each other, the three orthogonal magnetic fields are respectively measured, the differential voltage output of the magnetic field at the sensor in the direction of the X, Y, Z sensitive axes can be obtained, and the three voltage values can be used for judging the direction of the partial discharge power supply at the sensor. If six triaxial TMR magnetic sensors are placed in a GIS, two three triaxial TMR magnetic sensors are placed at hand holes of the GIS, and the other four triaxial TMR magnetic sensors are tightly attached to appropriate positions of the basin-type insulator in an array form, the 'line' with six angles can be obtained and points to a discharge position, and the position of partial discharge can be accurately known. Of course, the six cavities can be used for detecting a small section of cavity in the GIS device, and the whole GIS device needs more TMR magnetic sensors.
The above embodiments may be combined with each other.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Claims (6)
1. The utility model provides an extra-high voltage GIS equipment partial discharge fixes a position recognition device based on magnetic sensor which characterized in that includes: the TMR element and the GIS are external and comprises a first cylinder body (1) and a second cylinder body (2), wherein the first flanges (3) are respectively arranged at two opposite ends of the first cylinder body (1) and the second cylinder body (2), notches (101) are respectively formed in one sides of the inner walls of the first cylinder body (1) and the second cylinder body (2), a built-in sensor (4) is arranged in each notch (101), and a first basin-type insulator (5) is arranged between the first cylinder body (1) and the second cylinder body (2);
four three-axis TMR magnetic sensors (6) are uniformly arranged on one side of a first basin-type insulator (5), a second flange (7) is arranged on the other side of the first basin-type insulator (5), a signal receiver (8) corresponding to a built-in sensor (4) is arranged on the periphery of the second flange (7) and the first basin-type insulator (5), a second basin-type insulator (9) is arranged at one end of a second cylinder body (2), and the second basin-type insulator (9) is positioned between the second cylinder body (2) and the first flange (3);
a local discharge source (10) is installed on one side of the inner wall of the second cylinder (2), a conductor (11) is installed inside the first cylinder (1) and the second cylinder (2), and the conductor (11) penetrates through the middle parts of the first basin-type insulator (5) and the second basin-type insulator (9).
2. An extra-high voltage GIS device partial discharge positioning and identifying device based on magnetic sensor as claimed in claim 1 characterized in that the TMR element is provided with top layer, free layer, tunnel barrier layer, pinned layer, bottom layer, insulating substrate from top to bottom in sequence.
3. The device for locating and identifying the partial discharge of the extra-high voltage GIS equipment based on the magnetic sensor as claimed in claim 1, wherein the GIS comprises an outer GIS cavity signal receiver and an upper computer, and the outer GIS cavity signal receiver is in wireless transmission connection with the upper computer.
4. The extra-high voltage GIS device partial discharge positioning and identifying device based on the magnetic sensor is characterized in that a limited transmission TMR magnetic sensor module and a wireless transmission TMR magnetic sensor module are connected to a pulse magnetic field of a partial discharge source (10) in an induction mode.
5. The device for locating and identifying partial discharge of extra-high voltage GIS equipment based on magnetic sensors as claimed in claim 4, wherein the limited transmission TMR magnetic sensor module comprises a TMR magnetic sensor and a power supply module, the TMR magnetic sensor is connected with the power supply module, and the limited transmission TMR magnetic sensor module is connected with the GIS cavity external signal receiver in a wired transmission manner.
6. The device for locating and identifying partial discharge of extra-high voltage GIS equipment based on magnetic sensor as claimed in claim 4, wherein the wireless transmission TMR magnetic sensor module comprises a TMR magnetic sensor, a wireless communication unit and a power supply module, the TMR magnetic sensor is connected with the wireless communication unit and the power supply module, the wireless communication unit is connected with the power supply module, and the wireless transmission TMR magnetic sensor module is connected with the signal receiver outside the GIS cavity in a wireless transmission way.
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| CN202022756467.2U CN213780266U (en) | 2020-11-25 | 2020-11-25 | Extra-high voltage GIS equipment partial discharge positioning and identifying device based on magnetic sensor |
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| CN202022756467.2U CN213780266U (en) | 2020-11-25 | 2020-11-25 | Extra-high voltage GIS equipment partial discharge positioning and identifying device based on magnetic sensor |
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Assignee: HYLIGHT TECHNOLOGY CO.,LTD. Assignor: ZHONGKE WEIBO (SUZHOU) INTELLIGENT TECHNOLOGY Co.,Ltd. Contract record no.: X2023310000095 Denomination of utility model: Partial Discharge Location and Identification Device for UHV GIS Equipment Based on Magnetic Sensors Granted publication date: 20210723 License type: Common License Record date: 20230615 |